Mitsubishi Electric ecodan EHPT20Q-VM2EA Installation Manual page 15

5
System Set Up
Service Menu
The service menu provides functions for use by installer or service engineer. It is NOT intended the home owner alters settings within this menu. It is for this reason
password protection is required to prevent unauthorised access to the service settings.
The factory default password is "0000".
Follow the procedure described in General Operation for the set up operation.
The service menu is navigated using the F1 and F2 buttons to scroll through
the functions. The menu is split across several screens and is comprised of the
following functions;
1. Manual operation
2.
Function settings
3. Thermistor adjustment
4. Auxiliary settings
5. Heat source setting
6. Pump speed
7. Operation settings
8. Energy monitor settings
9. Running information
10. Thermistor reading
11. Summary of settings
12. Error history
13. Password protection
14. Manual reset
15. SD card
Many functions can not be set whilst the indoor unit is running. The installer should turn off the unit before trying to set these functions. If the installer attempts to
change the settings whilst the unit is running the main controller will display a reminder message prompting the installer to stop operation before continuing. By select-
ing "Yes" the unit will cease operation.
<Manual operation>
During the filling of the system the water circulation pump and 3-way valve can be manually overridden
using manual operation mode.
When manual operation is selected a small timer icon appears in the screen. The function selected will
only remain in manual operation for a maximum of 2 hours. This is to prevent accidental permanent
override of the FTC.
Pressing F3 /D button will switch manual operation mode ON for the main 3-way valve. When filling of
the thermal store tank is complete the installer should access this menu again and press F3 /D to
deactivate manual operation of the part. Alternatively after 2 hours manual operation mode will no
longer be active and FTC will resume control of the part.
<Auxiliary settings>
This function is used to set the parameters for any auxiliary parts used in the system
Menu subtitle Function/ Description
Economy settings for Water pump stops automatically a specified period of time from when operation is
pump finished.
Delay Time before pump switches off*1
Electric heater To select "WITH booster heater (ON)" or "WITHOUT booster heater (OFF)" in
Heating mode.
(Heating)
Delay The minimum time required for the booster heater to turn ON after Heating mode
has started.
*1. Decreasing "time before pump switched off" may increase the duration of stand-by in Heating mode.
<Heat source setting>
The default heat source setting is heat pump and booster heater present in the system to be operational.
This is referred to as Standard operation on the menu.
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In this Installation Manual, instructions will be given only for the following
functions;
1. Manual operation
2. Auxiliary settings
3. Heat source setting
4. Pump speed
5. Operation settings
6. Energy monitor settings
7. Password protection
8. Manual reset
9. SD card
Information on the other functions can be found by consulting the Service Manual.
Being engaged Error
indication
Being considered
(before selection)
Manual operation menu screen
Auxiliary settings menu screen
5
System Set Up
<Operation settings>
Heating operation
This function allows operational setting of flow temperature range from the Ecodan and also the time interval at which the FTC collects and processes data for the auto
adaptation mode.
1. Heating operation for auto adaptation mode
Menu subtitle Function
Flow temp. range Minimum temp. To minimize the loss by frequent ON and OFF in mild outdoor ambient
temperature seasons.
Maximum temp. To set max. possible flow temperature according to the type of heat emitters.
Room temp. control Mode Setting for Room temp. control
At Fast mode, target outlet water temperature is set higher than the one
set at normal mode. This reduces the time to reach the target room-
temperature when the room temperature is relatively low.*
Interval Selectable according to the heat emitter type and the materials of floor (i.e.
radiators, floor heating-thick, -thin concrete, wood, etc.)
Heat pump thermo diff.adjust On/Off To minimize the loss by frequent ON and OFF in mild outdoor ambient-
temperature seasons.
Lower limit Prohibits heat pump operation until the flow temperature drops below the
target flow temperature plus lower limit value.
Upper limit Allows heat pump operation until the flow temperature rises above the
target flow temperature plus upper limit value.
<Table 5.7.1> Heating operation(Room temp.control table)
Note:
1. The minimum flow temperature that prohibits heat pump operation is 20ºC.
2. The maximum flow temperature that allows heat pump operation equals to the maximum temperature set in the Flow temp. range menu.
* Fast mode is not most efficient and will result in increased running cost when compared to normal mode.
2.Heating operation for auto adaptation, compensation curve, and flow temp. control
Menu subtitle Function
Flow rate setting Mode Auto mode automatically selects a flow rate from 3 to 7 L/min appropriate
for effective operation according to Room temp. control. Manual mode
targets Flow rate setting value.
※Select Manual mode except for Room temp. control.
Flow rate Select the target circulation flow rate for heating at Manual mode.
※Be aware of the shortage of required flow rate for each heat emitters.
Note: Recommended flow rate setting at Manual mode is listed below.
・When the Flow temp. is high (e.g. radiator) recommended flow rate is low
・When the Flow temp. is low (e.g. underfloor heating) recommended flow rate is high.
・Low flow rate setting with low flow temp. may cause frequent ON/OFF operation of pump.
* In case of "Compensation curve mode" or "Flow temp. mode" selected, even if flow rate setting is "Auto" mode,flow rate will be fixed at "7.0 L/min".
Freeze stat function
Menu subtitle Function/ Description
Freeze stat function An operational function to prevent the water circuit from freezing when outdoor ambient temperature drops.
Flow t. The target outlet water temperature at water circuit when operating in Freeze stat function.
Outdoor ambient temp. Minimum outdoor ambient temperature which freeze stat function will begin to operate,
(3 - 20ºC) or choose**. If asterisk (**) is chosen freeze stat function is deactivated. (i.e. primary water freeze risk)"
Note:
1. When the system is turned off, freeze stat function is not enabled.
2. Flow t. is fixed at 20ºC and unchangeable.
Range Unit
25 - 45 ºC
35 - 60 ºC
Normal/ --
Fast
10 ~ 60 mins.
On/Off —
ºC
+3 - +15 ºC
Range Unit
Auto */ —
Manual
3 - 8 L/min
<Table 5.7.2>
Default
40
50
Normal
10
On
+9
Default
Auto
7
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